The numbers are from the CDC’s HIV Surveillance Report, which comes out every three years, CBS said. The latest statistics are from 2011 and find Philadelphia ranked 24th among metro areas in terms of new diagnoses with about 12,000 people living with AIDS in the city. An ActionAIDS official told CBS about 75 percent of the new cases diagnosed were at “stage three” for AIDS.

“It means they have full blown AIDS when they find out they’re sick, which is way too late in terms of the disease progression,” Kevin Burns, executive director of ActionAIDS told CBS. Early testing is the key to keeping patients healthy, Burns and other health experts said.